springframework.core.io.Resource always throw java.io.FileNotFoundException

Question

I am a beginner for Spring, and I am learning Resource.

package com.smart.beanfactory;

import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

public class BeanLifeCycle {
    private static void LifeCycleInBeanFactory() {
        Resource res = new ClassPathResource("classpath:com/smart/beanfactory/beans.xml");
        try {
            System.out.println(res.getURL());
        } catch (Exception e) {
            System.out.println(e.fillInStackTrace());
        }
    }

    public static void main(String[] args) {
        LifeCycleInBeanFactory();
    }
}

I write the above simple code just to use the classpath to load the .xml file.

Below is the hierarchy of my project:

Then I tried the absolute file path in Resource res = new ClassPathResource("file:/Users/haoxu/Documents/Code/Java/anotherchapter4/src/main/resources/com.smart/beanfactory/beans.xml"); But that also cannot work. It just told me "java.io.FileNotFoundException: class path resource [Users/haoxu/Documents/Code/Java/anotherchapter4/src/main/resources/com.smart/beanfactory/beans.xml] cannot be resolved to URL because it does not exist "

-----------update--------

I modified my code to:

package com.smart.beanfactory;

import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

import java.io.File;

public class BeanLifeCycle {
    private static void LifeCycleInBeanFactory() {
        Resource res = new ClassPathResource("/com/smart/beanfactory/beans.xml");
        try {
            System.out.println(res.getURL());
        } catch (Exception e) {
            System.out.println(e.fillInStackTrace());
        }
    }

    public static void main(String[] args) {
        LifeCycleInBeanFactory();
    }
}

But I still get "java.io.FileNotFoundException: class path resource [com/smart/beanfactory/beans.xml] cannot be resolved to URL because it does not exist"

have you tried `"com.smart.beanfactory/beans.xml"` like it shows in the project tree? — RickyM, Jan 04 '18 at 04:52
I tried it but it cannot work. java.io.FileNotFoundException: class path resource [com.smart.beanfactory/beans.xml] cannot be resolved to URL because it does not exist — HAO, Jan 04 '18 at 04:54
Maybe it's the directory, instead of the com.smart.beqnfactory you should use a plain folder named xml or something then in the resource creation use "/xml/beans.xml". — RickyM, Jan 04 '18 at 05:44

score 2 · Answer 1 · answered Jan 04 '18 at 04:45

2

The prefix classpath: is not required for ClassPathResource

answered Jan 04 '18 at 04:45

amdg

2,211
1
14
25

agree. See the explanation on https://stackoverflow.com/questions/36588915/how-spring-classpathresource-is-working – Alex M981 Jan 04 '18 at 04:46
1

according to your screenshot there is no beans.xml file in classpath. See under "target/..." dir. beans.xml file must appear there automatically when you run your app – Alex M981 Jan 04 '18 at 05:06
Yes. My IDE seems does not put the .xml file to the target/ dir. I do it by myself and then the code works! – HAO Jan 04 '18 at 05:10
The target directory is the result of the build, you shouldn't be adding files to it. – RickyM Jan 04 '18 at 05:52

score 0 · Answer 2 · edited Jan 04 '18 at 05:46

0

try the below line with your code

Resource res = new ClassPathResource("/resources/com/smart/beanfactory/beans.xml");

edited Jan 04 '18 at 05:46

Sasikumar Murugesan

4,412
10
51
74

answered Jan 04 '18 at 04:51

Arthur Lin

1
1

still get java.io.FileNotFoundException: class path resource [resources/com/smart/beanfactory/beans.xml] cannot be resolved to URL because it does not exist – HAO Jan 04 '18 at 04:52
It should work have included "/" like "/resources/com/smart/beanfactory/beans.xml" this? – Sasikumar Murugesan Jan 04 '18 at 04:59

score 0 · Answer 3 · answered Jan 04 '18 at 05:09

I copy and paste the file "beans.xml" to the directory "target/classes/com/smart/beanfactory/". The hierarchy is like below

My code is like below:

package com.smart.beanfactory;

import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

import java.io.File;

public class BeanLifeCycle {
    private static void LifeCycleInBeanFactory() {
        Resource res = new ClassPathResource("com/smart/beanfactory/beans.xml");
        try {
            System.out.println(res.getURL());
        } catch (Exception e) {
            System.out.println(e.fillInStackTrace());
        }
    }

    public static void main(String[] args) {
        LifeCycleInBeanFactory();
    }
}

The result is "file:/Users/haoxu/Documents/Code/Java/anotherchapter4/target/classes/com/smart/beanfactory/beans.xml "

This is actually the path of the file. But it is in the target directory. I think that is really strange.

springframework.core.io.Resource always throw java.io.FileNotFoundException

3 Answers3